group a streptococcal serotypes isolated from healthy schoolchildren in iran. | serotypes of group a streptococci are still a major cause of pharyngitis and some post-infectious sequelae such as rheumatic fever. as part of the worldwide effort to clarify the epidemiological pattern of group a streptococci in different countries, the present study was conducted to assess the prevalence of streptococcus pyogenes serotypes in iran. a total of 1588 throat swabs were taken from healthy school children in the city of gorgan during february and march 1999. of those isolates, 175 r ... | 2003 | 12884067 |